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Effects of landfill age, climate, and size on leachate from urban waste landfills in Portugal: A statistics and machine learning analysis by Joana Martins dos Santos; Leonor M. Amaral; Graça Martinho is a Environmental Science article available to read on EtoBox.

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The leachate generated by in urban waste landfills can cause environmental pollution if not controlled and treated. With different proportions of biodegradable waste, urban waste degrades over several phases in anaerobic conditions within a landfill. Using multivariate leachate data from 32 engineered landfills in Portugal, each with a similar waste composition, and all classified as non-hazardous waste landfills receiving urban waste, statistical inference was applied to categorise and deduce significant statistical differences in leachate volume and quality between landfill age, size, and climate, as well as the interactions and effects within these categories. The findings show that the effects of size and age on the leachate volume are prevalent over local, Mediterranean climate conditions; in larger landfills, waste may not be degrading as efficiently as in medium-sized landfills; hotter zones showed higher levels of COD and lower levels of BOD 5 than warmer zones, indicating increased biological activity under higher temperature conditions; TN and NH 4 -N increase significantly with age and size; Cl -also significantly increases with age, showing higher levels, along with SO

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Author

Joana Martins dos Santos; Leonor M. Amaral; Graça Martinho

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)